Sony MDR-NC500D Servise Manual page 15
Noise canceling headphones
Hide thumbs
Also See for MDR-NC500D:
- User manual ,
- Product information (88 pages) ,
- Operating instructions manual (27 pages)
Table of Contents
Advertisement
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
For Printed Wiring Boards.
Note:
• Y : parts extracted from the conductor side.
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
Caution:
Pattern face side:
Parts on the pattern face side seen from
(SIDE B)
the pattern face are indicated.
Parts face side:
Parts on the parts face side seen from
(SIDE A)
the parts face are indicated.
• MAIN board is multi-layer printed board. However, the
patterns of intermediate-layers have not been included in
diagrams.
• Lead layouts
Lead layout of conventional IC
CSP (Chip Size Package)
• Waveforms
– MAIN Board –
IC472
(SW1)
0.5 Vp-p
472 ns
200 mV/DIV, 200 ns/DIV
IC472
(SW2)
0.6 Vp-p
468 ns
200 mV/DIV, 200 ns/DIV
MDR-NC500D
For Schematic Diagrams.
Note:
• All capacitors are in µF unless otherwise noted. (p: pF) 50
WV or less are not indicated except for electrolytics and
tantalums.
• All resistors are in Ω and 1/4 W or less unless otherwise
specifi ed.
• A : B+ Line.
• H : adjustment for repair.
• Power voltage is dc 3.7 V and fed with regulated dc power
supply from CN403 pin 1 and pin 2 on the CHARGER
board.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : POWER ON
• Voltages are taken with VOM (Input impedance 10 MΩ).
surface
Voltage variations may be noted due to normal production
tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production
tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F
: AUDIO (ANALOG)
J
: AUDIO (DIGITAL)
N
: MONITOR
• The voltage and waveform of CSP (chip size package)
cannot be measured, because its lead layout is different
from that of conventional IC.
• Abbreviation
CND : Canadian model
JE
: Tourist model
IC473
(SW1)
IC501
0.7 Vp-p
468 ns
81.5 ns
200 mV/DIV, 200 ns/DIV
100 mV/DIV, 50 ns/DIV
IC473
(SW2)
0.7 Vp-p
472 ns
500 mV/DIV, 200 ns/DIV
• Circuit Boards Location
MAIN board
(XTO)
0.2 Vp-p
15
15
– Rch –
POWER board
MODE board
RESET board
MDR-NC500D
– Lch –
CHARGER board
JACK board
Hide quick links:
Advertisement
Table of Contents
